Answer ;
In television the better and the worst should be chosen by us
Answer: Fabio's attitude changed because he'd be in the parade.
Explanation: Fabio is excited to be able to participate in the parade. The focus of the question isn't on why he'd be in the parade or how? But on what makes his attitude change. Every other factor mentioned corroborates that he'd be participating in the parade.
A working thesis statement is similar to a regular thesis statement. The only difference is that you can change this one as much as you want before you decide on your last thesis statement. A working statement is not your final version of the thesis statement.